Fran--don't despair--science is for geeks! You know how you tell an introverted scientist from an extroverted scientist? An introvert looks at his own shoes, but an extrovert looks at your shoes. (ba-dump-bump)

8/8 for me, the one that threw me was what was the charge on a "neuron". Neutrons have a 0 charge, but I never heard of a neuron having a charge. It was a guess that was what they were going for.Caroline in SD